Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a826ed7c176f679…

MALICIOUS

PDF

74.0 KB Created: 2021-03-06 11:57:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 708af7f07e3acb4087d4b280eb2b3cc4 SHA-1: 5418c8798097354bb5f573a6074010e6833a25d8 SHA-256: 6a826ed7c176f679802233fcd2acae78fd71acbf6212455ff64274f5ac081834
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ponafet.ru/wix?keyword=car+launcher+apk+download PDF link annotation
    • http://vobalemujumojak.mywebcommunity.org/how_do_you_fill_up_a_brita_water_bottle.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/watch_tom_and_jerry_willy_wonka_and_the_chocolate_factory_online_free.pdfIn PDF document text
    • http://ruvujagefeko.mygamesonline.org/19992230048.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muwuvago.atwebpages.com/outlander_series_book_9_synopsis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6d1cfd8-5f8b-40d1-a4dd-d1632bb0e656/non_finite_verbs_exercises_with_answers_for_class_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a29414d9-cd85-4492-9fc0-1b7f84e1f086/fexerafifufetawon.pdfIn PDF document text
    • http://vobuxex.epizy.com/31164796487.pdfIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_d5b380c506354e21a9429d2a0bf2d753.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e56d0018-7424-4e49-9823-63cf7d26de3d/farivotejevazodoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7714c6f-b29c-4785-8c38-cdaa3c6764b5/falizunezev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff58bdb5-4129-46bb-9663-760a128769e4/english_dictionary_app_download_for_jio_phone.pdfIn PDF document text
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_f5382d6f510141d496679dbc407f1961.pdf?index=trueIn PDF document text
    • http://wumumusonozukak.epizy.com/char_broil_cooking_zone_1000_manual.pdfIn PDF document text
    • https://68e1e3d4-268d-49bc-a8aa-b119cb10fea7.filesusr.com/ugd/3ceeb9_4cb4a2ab45684ef5aee930c8e9d58555.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f75a0373-2fca-4be8-b47a-dd5298c095d4/how_to_use_everstart_maxx_air_compressor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feea8b08-519a-4603-b380-a3240bfc7646/fe2_fe3_redox_potential.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/399987b4-ead1-404b-93c6-b0d75f69d9f2/stihl_hedge_trimmer_battery_reviews.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE683 5044 bytes
SHA-256: 2fe0b0d36f16638377be5c996d3ea61b819c7350a11b6960279a03103439fbe9
font_01_sfnt_off0000f7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B0 10296 bytes
SHA-256: 78b31e296c56e59e03372ac49408d0f232c2a55db6ed3b7c08717196d90edb3a

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